fn main() {
    println!("Hello, world!");
    let x = 5u32;
    let y = {
        let x_squared = x * x;
        let x_cube = x_squared * x;
        x_cube + x_squared + x
    };
    let z = {
        2 * x
    };
    println!("x is {}", x);
    println!("y is {}", y);
    println!("z is {}", z);
}
